Using electrets to design concurrent magnetoelectricity and piezoelectricity in soft materials

Zeinab Alameh, Qian Deng, Liping Liu, Pradeep Sharma

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Piezoelectricity and magnetoelectricity are contradictory properties with a rather limited set of natural (often hard) materials that exhibit both. Composite materials - almost always restricted to hard ones - provide a limited recourse with the attendant limitations of small strains, fabrication challenges among others. In this article, using the concept of electrets, we propose a simple scheme to design soft, highly deformable materials that simultaneously exhibit piezoelectricity and magnetoelectricity. We demonstrate that merely by embedding charges and ensuring elastic heterogeneity, the geometrically nonlinear behavior of soft materials leads to an emergent piezoelectric and magnetoelectric behavior. We find that an electret configuration made of sufficiently soft (nonpiezoelectric and nonmagnetic) polymer foams can exhibit simultaneous magnetoelectricity and piezoelectricity with large coupling constants that exceed the best-known ceramic composites. Moreover, we show that these properties can be tuned with the action of an external field.

Original languageEnglish (US)
Pages (from-to)93-100
Number of pages8
JournalJournal of Materials Research
Volume30
Issue number1
DOIs
StatePublished - Sep 23 2014

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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